You have your lateral with negative VS section (with backstep). Your curve is displayed in VS scale, you drilled through the same VS 2 times for this well. It is very common situation. It's not a problem, it's your data in VS scale.
You can switch to MD horizontal scale on the panel to see the curve along the MD axes. You won't have any duplication in this case.
If you don't want to see the part of GR that belongs to the negative VS section in your data track - simply set MD range for GR in its format tab on the panel.